Knockdown oven.



WILLIAM R. JEAVONS, OF CLEVELAND, OHIO.

KNOCKDOWN OVEN.

Specification of Letters Patent.

Patented Feb. 11, 1908.

Application filed August 14- 1907. Serial No. 388545- T all whom it may concern:

Be it known that I, WILLIAM R. JEAvoNs, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented a certain new and useful Improvement in Knockdown Ovens, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings,

This invention relates to ovens which are employed with gas or vapor stoves, and has for its object to provide a knock-down" oven which may be shipped in unassembled condition, for the purpose of economizing space inshipment, and which may thereafter be conveniently assembled and which, when so assembled, shall possess all of the advantages of a permanent construction and shall form a tight receptacle for the retention of hot air and products of combustion.

Generally speaking, the invention may be defined as consisting of the combinations of elements embodied in the claims hereto annexed and illustrated in the drawings forming a part hereof, wherein Figure -1 represents a perspective view of an oven constructed in accordance with my invention; Fig. 2 represents an enlarged vertical sectional view through the oven shown in Fig. 1; Fig. 3 represents a horizontal sectional view of said oven; Fig. 4 represents a longitudinal vertical sectional'view; Fig. 5 represents an enlarged detail of one of the corners of the assembled ovens; and Fig, 6

represents a perspective detail of one of the corner clamps.

Describing the parts by reference characters, 1 represents the oven, the same comprising a plurality of members, viz.; a front 2, back 3, ends 4, top 5 and bottom 6, the

parts being of sheet metal held together by the corner clamps which will be described hereinafter.

, The front 2 is of unlined sheet metal, the

same being provided at the top and bottom thereofwith longitudinally extending grooves or recesses 7 and 8, respectively. These grooves or recesses may be conveniently formed by doubling the metal upon itself to form inner flanges, as shown at 9 and 10, and by folding the top and bottom of the sheet inwardly at right angles to the plane thereof and parallel with said flanges to provide outer flanges 11 and 12, respectively. The front is provided with a door 0 enmg, which is bounded by thef auge lE, t e upper edge said opening being preferably nearer the top of the sheet than is the lower edge of said opening to the bottom of the sheet.

14 denotes the oven door, which is hinged at one edge at one side of the door 0 ening and is provided with a button or latch 15 at its opposite edge. The door is formed of two sheets of metal 16 and 17 secured together by their edges and spaced apart between the body portions thereof to form an insulating air chamber therebetween.

The back 3 of the oven is formed of an outer sheet 18 to which there is applied a lining sheet 19, said sheets being spaced apart between the bodies thereof and being united at the edges, forming therebetween an air space. The upper and lower edges of the back are provi ed with longitudinal grooves or recesses 20 and 21, respectively, said re- 5 cesses bein substantially U-sha edinsection and being ormed by bending t e end of the outer sheet around the end of the inner sheet, the metal of the inner sheet being flattened against the metal of the outer sheet for a distance to ermit such flattened portions to be bent to orm the U-shaped 'roove or recess described. The groove 20 will be of the same width as the groove formed in the front plate between flanges 9 and 11, and the groove at 5 the bottom of the oven back will also be of the same width as the groove at the bottom of the front formed between flanges 10 and 12. The side edges of the inner and outer metal plates of the back are united in the same manner as the top and bottom edges, and said side edges are bent outwardly as shown at 22, whereby they overhang the outer sheet 18 and form therewith a vertical U-shaped groove for a purpose hereinafter describe Each of the ends ofthe oven is formed in the same manner as the back, with the difference that the inner and outer sheets 23 and 24 thereof are spaced further apart than is the case with the sheets of which the back is 00 composed. Longitudinal recesses 25 and 26 are rovided at the top and bottom, respective y, for the reception of the oven top 5 and also for the reception of the oven bottom 6. Each end is bent outwardly at 27 to form with the outer sheet a vertically extending recess similar to the recess formed at 22 by the outer edges of the back. Each inner sheet or lining of the ends 4 is provided with a suitable number of rack-sufports 28, which may be conveniently forme y bending the metal lining to form step-like projections or M ribs. It will be observed that the vertical portions of flange 13 at the sides of the door opening are substantially in line with the linings 24 of the oven ends, thereby making the door-openin at least as wide as the space between such inings. This enables the racks to be withdrawn through the door 0 ening and to be shifted from one set of rac r-supports to another without the necessity of tiltmg the racks.

The top 5 comprises an outer metal sheet 29 which is provided with an inner lining sheet 30 spaced therefrom and united thereto at the side edges, as shown at 31. The space between the sheets 29 and 30 is less than the space between the sheets of 'the ends 4, being substantially equal to the space between the sheets comprising the back of the oven. The oven bottom comprises a single sheet of metal having an elon ated opening 32 therein for the reception 0 the products of combustion of the burner.

For the purpose of securing the. oven members together, I provide corner clamps 33 therefor, each of said clamps being made from a single sheet of metal bent into proper sha e to engage the flanges 22 and 27. In mal ing this clamp, a sheet of metal of proper width is bent along the longitudinal center thereof to form two outer members 34 ar ranged at right angles to each other, and the outer edges of members 34 are then bent inwardly at 35 to form, with the bodies thereof, substantially U-shaped grooves or recesses. The lower edges of the inwardly directed flanges 35 are beveled outwardly, as shown at 36 (Fig. 6), to facilitate the application of the clamps to the flanges on the ends of the oven members. The upper end of the sheet from which the corner clamp is formed is gored or mitered centrally thereof and then bent downwardly to form the flange 37, which is at right angles to the length of the-clamp and which is adapted to engage the top of the oven and form a stop therewith.

In assembling the various members thus described, the back and sides will be laced together with the adjacent rounded ec ges of the flanges 22 and 27 in contact, as shown in Fig. 5. The corner clamps 33 will then be applied to the corners. These clamps will engage the metal of the flanges 22 and 27 at the bottoms of the grooves or recesses formed thereby and tend to force said flanges into close engagement, as shown in Fig. 5. It will be observed from Fig. 5, that the side and end flanges are shorter than the flanges 35 of the clamp. This is important in securing a tight joint between the corners of the side and end members of the oven, as it insures the engagement of the ends of the flanges 35 with the bottoms of the recesses or grooves formed between side and end flanges 22 and 27 and their respective oven members, and enables the flanges 35 to force the bottoms of the grooves or recesses together without hindrance b the ends of flanges 22 and 27. The bevehng of the lower ends of the flanges 35 facilitates the application of the clamps to the corners, and the clamps may be slid downwardly upon the flanges 22 and 27 with but little effort until the flanges 37 engage the upper flanges formed on the back and ends of the oven. If desired, the top and bottom of the oven may be placed in position prior to thapplication of the clamps to the rear corners of the oven, or the top and bottom may be slid into place after the clamps have been ap lied to the rear corners of the oven, the s1 e edges of the top and bottom being retained in place during this operation by the grooves or recesses formed at the tops and bottoms of the ends. When in place, the rear edges of the top and bottom will be retained within the grooves or recesses formed at the top and bottom of the back, respectively. The ovenfront may be applied with its top and bottom flanges engaging the front edges of the top and bottom of the oven, as shown in Fig. 2.

The oven front is also provided with outwardly projecting flanges 22 similar to the flanges 22 formed on the oven back. Flanges 22 will be brought into contact'with flanges 27 on the ends of the oven, and the front corner clamps 33 may then be applied and will com lete the assembling of the oven.

It wil be noted, particularly from an inspection of Fig. 5, that the vertically extending grooves which are formed at the ends of the back and ends of the oven are formed almost entirely outside of the point at which the lining is bent outwardly to engage the outer metal sheet, whereby the metal from which the out-turned flanges is formed is free to yield on such point of junction as a pivot. This is of importance in the matter of assembling the oven members, as it may happen that the rounded ortions of adjacent flanges do not abut and orm a perfect joint therebetween. When the corner clamp is applied, the ability of the outturned flanges to yield inwardly or toward each other will enable them to be brought into proper position by the action of the corner clamp.'

When assembled, the inner sheet or linin of the top 5 will rest on top of the horizonta beads formed on the inner sheets or linings 24 of the ends and upon the flange 9 of the front and the horizontally extending portion of the inner sheet or lining of the back. Each end of the oven is provided with a suitable number of openings 38 located near the top of the lining sheet and with openings 39 located near the bottom of the outer sheet, providing means whereby the hot air and products of combustion may circulate downwardly through the ends.

The oven above described is cheap of production, is conveniently assembled, and, when assembled, forms a tight and rigid structure.

Having described my invention, I claim:

1. An oven comprising a top, back and ends, the ends being each provided with a lining spaced therefrom and each provided at its upper end with a longitudinally extending groove whereof the lining forms the bottom, the edges of the top being fitted in said grooves, substantially as specified.

2. An oven comprising a top, back and ends, each end and the back being provided with a lining and having at the top thereof a longitudinally extending groove or recess, the bottom whereof is formed by the top of the lining, the said oven top being fitted in said grooves and resting on top of said linings, substantially as specified.

3. An oven comprising a top, back and ends, the back and ends being each provided with a lining and havingat their upper ends each a longitudinally extending groove or recess, whereof he top of the lining forms.

the bottom, said top being provided with a lining and being fitted in said grooves with said lining engaging the tops of the linings of the back and ends, substantially as specified.

4. In a knock-down oven, the combination of a side and an end, each having a vertically extending outwardly projecting flange forming with the body thereof a substantially U-shaped groove, and a corner clamp adapted to embrace said flanges and having inwardly projecting flanges adapted to engage the bottoms of the grooves, the ends of the side and end flanges terminating short of the bottoms of the recesses formed between the body of the corner clamp and each inwardly projecting flange thereof, substantially as specified.

5. In a knock-d own oven, the combination of a side and an end, each provided with an out-turned vertically extending flange, and a clamp therefor, said clamp having a body portion provided with. inturned flanges adapted to embrace said out-turned flanges, the lower portions of the inner edges of the inturned flanges being beveled outwardly.

6. In a knock-down oven, the combination of a side and an end, each having a vertically extending out-turned flange and a corner clamp therefor, said clamp comprising. a body portion provided. with inturned flanges adapted to embrace the out-turned flanges, the upper end of the body portion being bent inwardly to form a stop for engaging the top of the oven, substantially as specified.

7. In a knock-down oven, the combination of the side and. end members, each being provided with an outturned vertical flange forming with the outer surface of its member a vertically extending groove, the flanges on said members being adapted to abut each other, a lining for each of said membis;

spaced therefrom at its central portion and engaging the same adjacent to the lateral edge thereof, at a point distant from the abutting portion of its out-turned flange, and a corner clamp having inturned flanges adapted to slidably engage the out-turned flanges on the oven members, substantially as specified.

8, An oven comprising top, back and end members, the back and end members being each proviCed with .a lining spaced therefrom and bent at its upper end at substantially right angles to the body of its member and secured thereto, the upper portion of each back and end member having a flange forming a groove with the subjacent portion of the lining, the edges of the top being fitted in said grooves, substantially as specified.

9. In a knock-down oven, the combination of a side and an end, each having a vertically extending out-turned flange, and a clamp for said flanges, said clamp having a body portion adapted to cover the joint between the said flanges and being provided with inturned flanges adapted to embrace the outturned flanges and to bear against the bottoms of the recesses formed between said flanges and their respective oven members, the top of the clamp being provided with a horizontal covering adapted to engage he tops of the side and end members of the or m, substantially as specified.

10. In a knock-down oven, the combination of a side and an end member each provided with an out-turned vertically extending flange and each having a lining, the ends of the linings being bent substantially at right angles to the bodies thereof and abutting against their respective members at points inside of the lateral edges thereof, and a corner clamp having a body portion adapted to cover the joint between the flanges on the side and end members and being provided with inturned flanges adapted to embrace the out-turned flanges of such side and end members, substantially as specified.

11. An oven comprising a plurality of vertically extending members each having a lining, each lining being bent substantially at right angles adjacent to the upper end thereof into engagement with its member and each of said members being provided with a flange beyond the point of engagement of the lining therewith forming with the adjacent portion of the lining a groove, and an oven top having a lining and fitted in such grooves with its lining engaging the tops of the other linings, substantially as specified.

12. An oven comprising a back and ends, each end and the back being provided with a lining spaced therefrom, and each provided at the top and bottom thereof with a longitudinally extending groove whereof the lin-- ing forms one wall, and a top and a bottom 13. An 0 n comprising a pair of end members, each of said members being provided with a lining spaced therefrom and each provided at one end thereof with a longitudinally extending groove whereof the lining forms one wall, and a third member fitted in said grooves, substantially as specified.

14. An oven comprising back and end members, each member being provided with a lining spaced therefrom and each member having at one end thereof a longitudinally extending groove whereof the linin forms one wall, and a fourth oven member fitted in said grooves of the back and end members, I

substantially as specified.

WILLIAM R. J EAVONS.

Witnesses:

G. A. MYERS, J. B. HULL. 

